TI TPS92310离线大功率LED驱动解决方案

TI 公司的TPS92310是离线初级侧检测带PFC的控制器,设计用来照明的大功率LED驱动器,采用恒定的导通时间和准谐振开关技术,具有高的功率系数,良好的EMI行能和高的系统效率.主要用在A19 (E26/27, E14), PAR30/38和GU10型LED灯与固态照明.本文介绍了TPS92310主要特性,方框图,典型应用电路图,隔离和非隔离拓扑的电路图,以及TPS92310 EVM-8W评估模块主要特性,电路图,材料清单和模块PCB元件布局图.
TPS92310: Off-Line Primary Side Sensing Controller with PFC
The TPS92310 is an off-line controller specifically designed to drive high power LEDs for lighting applications. With the primary side sensing, constant on-time and quasi-resonant switching techniques, the TPS92310 application circuit gives high Power Factor, good EMI performance and high system efficiency. Also, using this device, low external component count application solutions can be designed easily. Power Factor Correction is inherent if the TPS92310 is operated in the constant on-time mode with an adaptive algorithm. The control algorithm of TPS92310 adjusts the on-time with reference to the primary side inductor peak current and secondary side inductor discharge time dynamically, the response time of which is set by an external capacitor. Also, minimized EMI and switching loss is achieved with quasi-resonant switching. Other supervisory features of the TPS92310 include cycle-by-cycle primary side inductor current limit, VCC under-voltage lockout, output over-voltage protection and thermal shutdown. The TPS92310 is available in the MSOP-10 package.
TPS92310主要特性:
■ Regulates LED current without secondary side sensing
■ Adaptive ON-time control with inherent PFC
■ Critical-Conduction-Mode (CRM) with Zero-Current Detection (ZCD) for valley switching
■ Programmable switch turn ON delay
■ Programmable Constant ON-Time (COT) and Peak Current Control
■ Over-temperature protection
TPS92310应用:
■ LED Lamps: A19 (E26/27, E14), PAR30/38, GU10
■ Solid State Lighting

图1.TPS92310方框图

图2.TPS...